OPRHT70 A0310
10-4
10
Explanation of Modes and Controls
Backup Ventilation is not active for 60 seconds after the user adjusts
ventilator controls, changes modes or starts ventilation from the
Setting condition.
During Backup Ventilation, the Alarm Silence/Reset button can be
pressed to silence the audible alarm. This will not cancel Backup
Ventilation.
When linked with the Low Minute Volume alarm, Backup Ventilation
is based on the delivered inspiratory minute volume. The inspiratory
minute volume may be different from the expiratory minute volume in
some conditions, such as in the case of a patient breathing circuit or
airway leak or circuit disconnect.
Backup Ventilation in A/CMV and SIMV Modes:
The factory default setting for Backup Ventilation in these two modes
will increase the respiratory rate by 1.5 times the set rate, up to a
maximum of 99 b/min. The minimum breath rate delivered is 15 b/min.
The respiratory rate (RR) will only increase up to a rate that produces
a 1:1 I:E ratio even if the calculated Backup Ventilation rate is higher.
Backup Ventilation in Spont Mode:
The factory default setting for Backup Ventilation in the SPONT mode
will implement these changes:
SPONT = SIMV mode
Rate = 15 b/min
Pressure Control breath type = 15 cmH2O above set PEEP
i time = 1.0 sec
Cancellation of Backup Ventilation
User Canceled
If during Backup Ventilation, the user adjusts any ventilation
parameter, Backup Ventilation is suspended for one minute and all
user selected ventilation parameters are employed.
60 seconds must pass after parameter adjustments before a linked
alarm violation will result in Backup Ventilation.
Patient Canceled
If linked to low minute volume, when delivered inspiratory minute
volume exceeds the Low MVI alarm setting by 10%, Backup
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